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Fluid collection device and full surface saturation method for core fluid full surface saturation

A full-surface, core technology, used in earth-moving drilling, wellbore/well components, etc., can solve the problems of small contact area, fast seepage speed, slow seepage speed, etc., to expand seepage area, increase seepage flow, improve The effect of saturation efficiency

Active Publication Date: 2020-04-10
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a liquid collecting device and a method for full surface saturation of the fluid of the rock core, which overcomes the problems of small contact area, slow seepage velocity, and large measurement error in the prior art, and can make the entire surface of the rock core In contact with water / oil, the seepage speed is fast, and the liquid collection device can accurately measure the volume of saturated water and saturated oil

Method used

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  • Fluid collection device and full surface saturation method for core fluid full surface saturation
  • Fluid collection device and full surface saturation method for core fluid full surface saturation
  • Fluid collection device and full surface saturation method for core fluid full surface saturation

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Embodiment Construction

[0048] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0049] Such as figure 1 , figure 2 As shown, the present invention provides a liquid collection device 100 with a full-surface saturation of the fluid of the core. The top of the liquid collection device 100 with the full surface saturation of the fluid of the core is fixed and sealed with a core holder 9 with an open bottom. A rock core 8 is fixed in the inner cavity of the device 9, and a radially telescopic sealing rubber cylinder 91 is arranged between the rock core 8 and the inner cavity side wall of the rock core holder 9, and the inner wall of the sealing rubber cylinder 91 and the side wall of the rock core 8 A core annulus is formed between them. During the saturation process, water or oil enters and exits the side of ...

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Abstract

The invention provides a liquid collecting device for rock core fluid full-surface saturation and a full-surface saturation method. The upper portion of the liquid collecting device is connected witha rock core clamping device with the open bottom in fixed and sealed modes, a rock core is fixed into an inner cavity of the rock core clamping device, and the liquid collecting device comprises a pressure-bearing connector connected with the bottom of the rock core clamping device in sealed and fixed modes. The lower portion of the pressure-bearing connector is in sealed connection with a constant-pressure liquid collecting cylinder, a piston type connector is sealed in the pressure-bearing connector in a penetrating mode, and the top of the piston type connector extends into a bottom openingof the rock core clamping device and connected into the inner cavity of the rock core clamping device in a sealed mode. The bottom of the piston type connector extends into an inner cavity of the constant-pressure liquid collecting cylinder. A center passage is formed in the piston type connector, and a piston is slidably arranged in the center passage. The side wall of the constant-pressure liquid collecting cylinder is provided with a saturation oil passage, and the bottom of the constant-pressure liquid collecting cylinder is provided with a liquid discharging outlet capable of being closed. According to the liquid collecting device for rock core fluid full-surface saturation and the full-surface saturation method, the full surface of the rock core can make contact with water / oil, theflow seepage speed is high, and the volumes of the saturated water and the saturated oil can be accurately measured.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a liquid collecting device and a full surface saturation method suitable for fluid full surface saturation of rock cores of ultra-low and ultra-low permeability. Background technique [0002] Most of the oil reservoirs in China are formed under the hydrodynamic environment. Therefore, the first step in simulating the development of oil reservoirs in the laboratory is to simulate the formation of oil reservoirs. The usual practice is to saturate the core with formation water first, and then saturate the core with crude oil, so as to form a core-scale simulated reservoir. The industry standard for oil and gas reservoir classification (SY-T6169-1995) has determined that the permeability of low-permeability reservoirs is 10-50mD, and the permeability of ultra-low-permeability reservoirs is <10mD (Li Daopin's "Low Permeability Oilfield Development" book It further ill...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 李实俞宏伟韩海水陈兴隆张可姬泽敏
Owner PETROCHINA CO LTD
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